# How is coulomb’s law similar to newton’s law of gravitation? How is it different?

## What are the similarities and differences between Coulomb’s force and gravitational force?

The comparison between the two forces—gravitational and electrostatic—shows some similarities and differences. Gravitational force is proportional to the masses of interacting objects, and the electrostatic force is proportional to the magnitudes of the charges of interacting objects.

## What are the similarities between electric force and gravitational force?

Both gravitational and electric field obey inverse square laws (e.g. F(grav)=GMm/r^2 and F(electric)=kq1q2/r^2 where GMm and kq1q2 are constants). They both act between two bodies without any means of contact. However gravitational force acts on mass while the electric force acts on charge.

## What equation is similar to Coulomb’s law?

Comparing Electrical and Gravitational Forces

Coulomb’s law equation for electrical force bears a strong resemblance to Newton’s equation for universal gravitation. The two equations have a very similar form. Both equations show an inverse square relationship between force and separation distance.

## What law of forces in Newtonian physics does Coulomb’s law resemble?

Newton’s law of gravitation resembles Coulomb’s law of electrical forces, which is used to calculate the magnitude of the electrical force arising between two charged bodies. Both are inverse-square laws, where force is inversely proportional to the square of the distance between the bodies.

## Which is stronger electrostatic force or gravitational force?

Electrostatic forces are much stronger than gravitational forces. This is because gravity depends on mass, atoms have tiny masses so t hat the gravitational forces between them is close to zero. Whereas, the electrostatic force related to charges is bigger.

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## What is basic difference between electrostatic force and gravitational force?

The electrostatic force is also known as the Coulomb force or Coulomb interaction. It’s the attractive or repulsive force between two electrically charged objects. Like charges repel each other while unlike charges attract each other. The gravitational force is a force that attracts any two objects with mass.

## What is the gravitational force formula?

Find out how to calculate gravitational forces

We can do this quite simply by using Newton’s equation: forcegravity = G × M × mseparation2 . Suppose: your mass, m, is 60 kilogram; the mass of your colleague, M, is 70 kg; your centre-to-centre separation, r, is 1 m; and G is 6.67 × 10 -11 newton square metre kilogram-2.

## Is gravity a field force?

In physics, a gravitational field is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body. … In its original concept, gravity was a force between point masses.

## What is the relationship between electric force and distance?

In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.

## Why is attractive force negative?

So a repulsive force is in the positive r direction and an attractive force is in the negative r direction . … you can apply this to Charged Particles Two postives give a Repulsive force ( P) and two non-alike charges give a Negative, therefore you can say that attraction is negative.

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## Why is Coulomb’s law important?

It signifies, the inverse square dependence of electric force. It can also be used to provide relatively simple derivations of Gauss’ law for general cases accurately. Finally, the vector form of Coulomb’s law is important as it helps us specify the direction of electric fields due to charges.

## Why r2 is used in Coulomb law?

Because when charges repel to each other .. then distance between them also increase with the factor of r square….. r square means square of distance which lies between two point charges. … Coulomb’s law is applicable to point charges and electron which is itself a quantum of charge is not a point charge.

## What is r in Coulomb’s law?

The distance between the two charges is “r.” The “r” actually stands for “radius of separation” but you just need to know it is a distance. The “q1” and “q2” are values for the amount of charge in each of the particles. Scientists use Coulombs as units to measure charge.